Your example worked on my end indeed.  However, I think my problem stems from the fact that I'm not adding new items to the grid like you are doing.  I have the same items in the grid but I'm updating them at the rate of around every 16.7 milliseconds.  So as the grid works now I can see all the items being updated.  They just need to resort themselves every time the items change.  Does that make sense?   

Matthew, 

Thank you for the details you have provided information. I understand that you are changing values of the existing data items not adding new ones. The sorting is applied when the grid loads and default sorting description is added or when user interact sort it using the SortIndicator. It does not re-sort when data item is changed because it is not notified that it have to. You could sort a column at runtime by setting the IsSorted property after data is modified. Please note that if the SortDirection is already set the same value e.g. Descending, you should first change it to None or Ascending and then to Descending. Here is a code snippet that demonstrates how this could be achieved on button click:

private void Button_Click_1(object sender, RoutedEventArgs e)

        {

            DataUtil.Products.ElementAt(5).ProductID = -29;

            TextColumn customSortColumn = xamGrid1.Columns[0] as TextColumn;

            customSortColumn.IsSorted = SortDirection.None;

            customSortColumn.IsSorted = SortDirection.Descending;          

        }

I hope this will help you.

Hello Matthew,

I am just checking if you have any other questions regarding the sorting functionality of XamDataGrid.

    I have a similar sorting issue with XamGrid bound to ObservableCollection and the underlying object implements INotifyPropertyChanged interface. All the fields that change do post PropertyChanged event but still Grid sorting is getting messed up (I have to resolve this bug on our application).

You mentioned that grid is not getting notified of change when the items change(to re-initiate sort), how do I go about doing that even though PropertyChanged Notification message is getting sent? Any suggestion?

or is the grid not listening to change notification to re-do the sorting kindof like feature cutting to show faster performance?

Thanks

Rajeswari

Hi Maria, 

The link above is no longer valid.

Thank you,

Michael

Hello Michael,

The address of the link above was wrong. It is now updated and should be opening correct. Thank you for mentioning it.
The sorting is not automatically applied when the data is updated as this might result in a row that is just being updated by the user going out of view. This is the reason that the sorting should be reapplied when the data is updated e.g. on CellExitedEditMode when a user update the cell or on InitializeRow when a new row is added.

Hi Maria,

We have a similar where existing row are updated frequently and one of the columns has the IsSorted property set to Ascending.

From a best-practices approach, what is the preferred way to keep the grid in the correct sorted order? 

...the row order changes as column data, with IsSorted,  is updated.

Regards,

Michael Perini